Headphones — Koss CL-5

The Koss CL-5 belongs to the clear series and is a corded on-ear set. The series is a line of retro styled models whose see-through housings echo the look of 1990s portable audio. It targets everyday listening from phones, computers and portable players.

Key specs that matter

The rated frequency response is 60 Hz to 20,000 Hz. Impedance is 32 ohms and sensitivity is 94 dB SPL at 1 kHz and 1 mW, so a phone or laptop output drives it directly. The cord is 1.8 m long and terminates in a 3.5 mm stereo plug.

Engineering and use context

The clear enclosures show the drivers inside, and soft leatherette cushions sit on the ear. The longer cord gives some freedom of movement at a desk or with a computer.

Alternatives

For a lighter and simpler set, Koss offers the CL-2, an on-ear clear model with foam cushions and a 1.2 m cord.